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<title>Problem 1688. -- [Usaco2005 Open]Disease Manangement -- 衡阳八中OJ离线版-2012-02-29</title><center><h2>1688: [Usaco2005 Open]Disease Manangement</h2><span class=green>Time Limit: </span>5 Sec&nbsp;&nbsp;<span class=green>Memory Limit: </span>64 MB<br><span class=green>Submit: </span>175&nbsp;&nbsp;<span class=green>Solved: </span>113<br>[<a href='submitpage.php?id=1688'>Submit</a>][<a href='problemstatus.php?id=1688'>Status</a>][<a href='bbs.php?id=1688'>Discuss</a>]</center><h2>Description</h2><div class=content>Alas!  A set of D (1 <= D <= 15) diseases (numbered 1..D) is running through
the farm.  Farmer John would like to milk as many of his N (1 <= N <= 1,000)
cows as possible.  If the milked cows carry more than K (1 <= K <= D)
different diseases among them, then the milk will be too contaminated and
will have to be discarded in its entirety.  Please help determine the
largest number of cows FJ can milk without having to discard the milk.

</div><h2>Input</h2><div class=content>* Line 1: Three space-separated integers: N, D, and K

* Lines 2..N+1: Line i+1 describes the diseases of cow i with a list
        of 1 or more space-separated integers. The first integer, d_i,
        is the count of cow i's diseases; the next d_i integers
        enumerate the actual diseases. Of course, the list is empty if
        d_i is 0.

有N头牛,它们可能患有D种病,现在从这些牛中选出若干头来,但选出来的牛患病的集合中不过超过K种病.</div><h2>Output</h2><div class=content>* Line 1: M, the maximum number of cows which can be milked.
</div><h2>Sample Input</h2>
			<div class=content><span class=sampledata>6 3 2<br />
0---------第一头牛患0种病<br />
1 1------第二头牛患一种病,为第一种病.<br />
1 2<br />
1 3<br />
2 2 1<br />
2 2 1<br />
</span></div><h2>Sample Output</h2>
			<div class=content><span class=sampledata>5<br />
<br />
OUTPUT DETAILS:<br />
<br />
If FJ milks cows 1, 2, 3, 5, and 6, then the milk will have only two<br />
diseases (#1 and #2), which is no greater than K (2). <br />
<br />
</span></div><h2>HINT</h2>
			<div class=content><p></p></div><h2>Source</h2>
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